﻿/*******************************************************************************************
 * Copyright (c) 2006-2009 Alex Robson, Rob Simmons, Craig Israel, and Rachel Twyford
 *
 * Use of this software in any form requires that you have both 
 * read and agreed to the following terms:
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the "Software"), 
 * to deal in the Software without restriction, including without limitation 
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 * Software is furnished to do so, subject to the following conditions: 
 *
 * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
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 * this list of conditions and the following disclaimer in the 
 * documentation and/or other materials provided with the distribution.
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using Nvigorate.Data;
using Nvigorate.Relational.Mapping.Index;

namespace Nvigorate.Relational.UnitOfWork
{
    public abstract class UnitOfWorkBase : IUnitOfWork
    {
        #region Fields

        private readonly IRepositoryMapIndex _repositoryMapIndex;
        private readonly IDataInterface _dataInterface;

        #endregion

        #region Protected Methods

        protected UnitOfWorkBase(IRepositoryMapIndex repositoryMapIndex,
                                 IDataInterface dataInterface)
        {
            _repositoryMapIndex = repositoryMapIndex;
            _dataInterface = dataInterface;
        }

        protected virtual ICommand CreatePersistCommand(object instance, bool enforceConcurrency)
        {
            return new PersistCommand(instance, _repositoryMapIndex, _dataInterface, enforceConcurrency);
        }

        protected virtual ICommand CreateDeleteCommand(object instance, bool recursive, bool enforceConcurrency)
        {
            return new DeleteCommand(instance, _repositoryMapIndex, _dataInterface, recursive, enforceConcurrency);
        }

        protected abstract void ExecuteCommand(ICommand command);

        #endregion

        #region Public Methods

        public void Persist(object instance, bool enforceConcurrency)
        {
            ExecuteCommand(CreatePersistCommand(instance, enforceConcurrency));
        }

        public void Delete(object instance, bool recursive, bool enforceConcurrency)
        {
            ExecuteCommand(CreateDeleteCommand(instance, recursive, enforceConcurrency));
        }

        #endregion
    }
}